Teilnehmer 676, da  "During the exploratory phases of our research, we first used secondary qualitative data previously collected through 54 semi-structured interviews (Walsh et al., 2010) (phase 1). We then added primary mixed data: quantitative (a survey with 640 participants) and qualitative (informal interviews) (phase 2). We used further primary quantitative data (676 participants) during the last, confirmatory phase (phase 3)."   und im Anhang  D3 bei "Total"  676  steht.